# CompareShots vs 3D Model Viewer

The clearest difference is review sentiment: CompareShots at 94% against 3D Model Viewer's 0%. CompareShots also leads on rating (5.0 vs 3.5) and in-app purchases (none vs 4). 3D Model Viewer's advantage is price (Free vs $3.99) and update cadence (every 4 days vs every 11 months). On ads, device support and iOS requirement there is nothing between them.

3D Model Viewer is free to download; CompareShots costs $3.99 up front. 3D Model Viewer sells 4 in-app purchases, starting at $2.99 per 7 days. CompareShots asks for nothing beyond the download.

CompareShots holds the better App Store score, 5.0 against 3.5. Both are backed by a comparable volume of ratings — 3 and 11 respectively. Written reviews point the same way: 94% of CompareShots's written reviews are positive against 0% of 3D Model Viewer's.

CompareShots ships an update every 11 months, 3D Model Viewer every 4 days. The most recent releases landed on October 9, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | CompareShots | 3D Model Viewer |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/compareshots-image-compare/id987237199/reviews)** | [3.5 (11 ratings)](https://appshunter.io/ios/app/3d-model-viewer-stl-and-usdz/id1587642013/reviews) |
| Number of ratings | 3 | **11** |
| Positive reviews | **94.4% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 4 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 6 MB | 15 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | +4 |
| Developer | [Space In Box](https://appshunter.io/developer/486967606) | [Ariel Ortiz](https://appshunter.io/developer/1583119689) |

## What reviewers say

### CompareShots

[App page](https://appshunter.io/ios/app/compareshots-image-compare/id987237199)

Easily compare two images side-by-side to check for exact matches or subtle differences. Adjust overlay opacity, switch between images with a tap, and even draw directly on the screen for detailed analysis. Share your findings with others.

**Highlights:** Side-by-side image display, Adjustable overlay opacity, Tap to switch images, On-screen drawing tools, Share comparison results

**Features:** macOS Compatibility

**In-app purchases:** none


### 3D Model Viewer

[App page](https://appshunter.io/ios/app/3d-model-viewer-stl-and-usdz/id1587642013)

Easily view and interact with 3D models in various formats like USDZ, STL, and OBJ. Explore your designs with intuitive gestures, high-performance rendering, and augmented reality capabilities. Record animations of your models for sharing.

**Highlights:** View USDZ, STL, OBJ, PLY files, Intuitive gesture controls, High-performance rendering, Augmented Reality (AR) visualization, Record rotation animations, Supports OBJ with textures

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Access | $2.99 | per 7 days |
| All Access | $3.99 | per month |
| All Access | $14.99 | per year |
| One-time payment | $3.99 | one-time |


## Frequently asked questions

### Is CompareShots free?

CompareShots costs $3.99, with no in-app purchases.

### Is 3D Model Viewer free?

3D Model Viewer is free to download, with in-app purchases available.

### Which has better reviews, CompareShots or 3D Model Viewer?

CompareShots is rated higher. CompareShots averages 5.0 out of 5 from 3 ratings, while 3D Model Viewer averages 3.5 from 11 ratings.

### Do CompareShots or 3D Model Viewer have ads?

Neither CompareShots nor 3D Model Viewer shows ads.

### Which is updated more often, CompareShots or 3D Model Viewer?

CompareShots ships an update every 11 months, and 3D Model Viewer every 4 days. Most recently, CompareShots was updated on October 9, 2026 and 3D Model Viewer on October 15, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*